John carlyle raymond



(No Model.)

J. C. RAYMOND. DRAFT PRODUCING DEVICE FOR STAGKS.

No. 577,322. Patented Feb. v16, 1897.

ATTORNEYS.

WITNESSES UNITED STATES PATENT OFFICE.

JOHN CARLYLE RAYMOND, OF NEW YORK, N. Y.

DRAFT-PRODUCING DEVICE FOR STACKS.

SPECIFICATION forming part of Letters Patent No. 577,322, dated.February 16, 1897.

Application filed October 10, 1895. Serial No. 565,273. (No model.)

To ctZZ whom it may concern.-

Be it known that 1, JOHN CARLYLE RAY- MOND, of New York city, in thecounty and State of New York, have invented a new and useful Improvementin Draft-Producing Devices for Stacks, of which the following is a full,clear, and exact description.

My invention is of that class that seeks to secure induced draft andreduce the height and cost of chimneys and funnels by the use of fans;and it consists of certain novel and useful devices which I will nowproceed to describe, and particularly point out in the claims.

There is a serious drawback to the use of the abnormally high funnelsnow used on steam vessels in the fact that they spoil the symmetricalappearance of the ship and at the same time present a large surface ofresistance to the wind, that seriously retards the ships progress.

Now my invention seeks to secure the advantages attaching to loftyfunnels and at the same time avoids the drawbacks, as above mentioned.It provides a mechanism in the top of a funnel of the usual height whichaugments the draft to any extent that may be desired.

As applied to the chimneys of stationary boilers on land my inventionenables the height of such chimneys to be greatly reduced, and, the costof my device being much less than the expense of a vertical height ofchimney of equal draft-inducing power, I

thereby effect a great economy in the first cost of any boilerinstallation.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indi catecorresponding parts in all the views.

Figure 1 is a side elevation of a steamer, showing my invention attachedto the top of the funnel. Fig. 2 is a cross-section through the funnel,showing the details of my electric fan and the wiring attached thereto.Fig. 3 is a plan view of the same, and Fig. 4 is a plan View showing thefan swung to one side of the funnel.

' At the upper end of the funnel A and on the outside thereof I securethe bracket B, which carries the electric motor 0 by means of the armsI) b. The upper arm I) has a vertically-projecting hollow shaft E, whichserves to carry a swinging arm F, which arm is arranged to swing freelyin a horizontal plane. At its outer end said arm is enlarged to receivethe vertical shaft G of the fan H, and its length is such that when itprojects over the funnel the center of said fan shall coincide with theaxis of the funnel.

The vertical hollow shaft E is bored to receive the motor shaft I, whichprojects through said hollow shaft and at its upper end is fitted with asprocket-wheel J. This wheel is geared by means of the sprocketchain Kto the sprocket-wheel L, which is keyed to the fan-shaft G, as shown inthe accompanying drawings.

For the purpose of swinging the arm F with its attached fan I provide asmall electric motor D, which is carried by the arm d, which projectsupwardly from the bracket B. The motor D is arranged in a horizontalplane and carries on its shaft a worm e, which engages a rackquadrant j,which is attached to or formed integrally with the swinging arm F. It isevident that the motor D, being attached to the bracket B, will, by itsoperation and the coaction of the worm-wheel e and the rack f, serve toswing the arm F in a horizontal plane. The rack f is provided at eachend with projections 1 2, which look against the worm e and limit thetravel of the arm F to a quarter of a circle turn.

The wires 0 c and d d from the motors are carried down to a switchboardM, which may be placed above deck, as at N, Fig. 1, or in theengine-room, as at N in the same figure.

The switch M is provided with an indexed face m, and by the operation ofthe switchhandle S upon such face the current may be sent, direct orreverse, through the motor D, or it may be sent through the motor 0, orit may be switched off altogether.

The motors are protected by ahood or casing P, of sheet iron or othersuitable material of cylindrical form, which is fastened to the shell ofthe funnel, as shown.

In operation when it is desired to run the boilers with unassistednatural draft by turning the handle S of the switch M to the properindex the motor D is operated so as to swing the fan H clear of thefunnel A, as shown in Fig. 4. When it is desired to in- ICO crease thedraft, the switch is moved so as to reverse the motor D, and the fan 11is swung back into position over the funnel, and by further manipulationof the switch the current is thrown into the motor 0, which by means ofthe sprocket-wheels J and L and the chain K operates the fan H. NowIclaim that by the location of the fan at the top of the funnel of thesteamship or the chimney of a landboiler I secure an increased draftthat is a close approximation in its action and in its result to naturaldraft. This result, moreover, is obtained without any of thedisadvantages attached to forced draft or an induced draft that isobtained by the use of abnormally high funnels or chimneys.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A device of the class described comprising an armmounted to swing, a fan journaled in the free end of the said arm, anelectric motor having its driving-shaft extending in the axis of thesaid arm and means for connecting the said motor driving-shaft with theshaft of the said fan, substantially as described.

2. A device of the class described comprising an arm mounted to swing, afan journaled in the free end of the said arm, an electric motor havingits driving-shaft extending in the axis of the said arm and means forconnecting the said motor driving-shaft with the shaft of the said fanand a second electric motor carrying on its shaft a worm in mesh with arack-quadrant on the said arm to impart a swinging motion to the saidarm, to move the fan from or to the top of funnel, substantially asdescribed.

3. A device of the class described'comprising an arm mounted to swingand carrying at its free end a fan, a rack-quadrant on the said arm, aworm in mesh with the said rackquadrant and an electric motor carryingthe said worm on its shaft, substantially as described.

JOHN GARLYLE RAYMOND.

\Vitnesses:

JNo. M. BITTER, F. W. HANAFORD.

